Community medicine 2020. 6-semester

Water Hygiene

1. Define the concept of "standards of drinking water supply":

1. 
   the estimated amount of water for drinking and household needs of one person for one day in a city or rural settlement in the normal operation of water supply systems and in emergency situations
   
2. 
   the estimated amount of drinking water to meet the drinking and household needs of one person for one day in a city or rural settlement in the normal operation of water supply systems and in emergency situations
   
3. 
   the amount of potable water for drinking and household needs of the person for a day in a city or rural settlement in the normal operation of water supply systems
   
4. 
   the amount of potable water for drinking and household needs of the person for a day in a city or rural settlement in the normal operation of water supply systems and in emergency situations.
   

2. The human need for drinking water at nominal load and in favorable natural conditions is:

1. 
   1-1.2 liters per day
   
2. 
   1.5-2 liters per day
   
3. 
   3 liters per day
   
4. 
   10 liters per day, including water coming from the food.
   

3. Drinking water should not:

1. 
   be epidemologically safe
   
2. 
   be safe in the ionizing radiation relation
   
3. 
   be harmless in chemical composition
   
4. 
   do not contain salts and trace elements.
   

4. Define the concept of "drinking water":

1. 
   Water, which in its quality meets the hygienic standards and is designed to meet the drinking and domestic needs of man, or to produce products for human consumption.
   
2. 
   Water, which in its quality in its natural state or after treatment meets hygienic standards and designed to meet human needs, or to produce products for human consumption.
   
3. 
   Water, which in its quality in its natural state or after treatment, meets the hygienic standards and intended to meet the drinking and domestic needs of man, or for the production of products for human consumption.
   
4. 
   Water, which in its quality in its natural state meets hygienic standards and designed to meet human needs, or to produce products for human consumption.
   

5. The main criterion in selecting sources of water supply is:

1. 
   the economic efficiency of its use
   
2. 
   water quality in line with international standards
   
3. 
   good physical properties
   
4. 
   protection from contamination.
   

6. What source of drinking water supply should be used first?

1. 
   flowing confined(artesian) well
   
2. 
   unconfined ground well
   
3. 
   river
   
4. 
   lake
   

7. What source is the best for drinking water supply?

1. 
   rain water
   
1. 
   flowing confined(artesian) well
   
   1. 
      unconfined ground well
      
2. 
   lake
   

8. The water source is considered suitable under the following condition:

1. 
   water quality is constant
   
2. 
   water quality is good
   
3. 
   the intensity of pollution and natural factors does not alter the reliability of the source
   
4. 
   any entering contamination eliminated by applicable purification methods.
   

9. When you select a source with the quality of water not fully compliant with the established standards under some circumstances, you will:

1. 
   reduce anthropogenic load on the source
   
2. 
   increase the volume of water and then mixing it with water of assured quality
   
3. 
   use various kinds of schemes and treatment methods in the treatment facilities
   
4. 
   decrease the volume of water taken from the water source and increase sales of bottled drinking water.
   

10. What is the first thing to pay attention to when choosing a water source?

1. 
   natureoforganolepticindicators
   
2. 
   flowrateandmicrobiologicalindices
   
3. 
   flow rate and water quality
   
4. 
   availabilityofsanitaryprotectionzones
   

11. What parasitological index do we use in assessing the quality of drinking water?

1. 
   Eggsopisthorchis
   
2. 
   lamblia
   
3. 
   amoebicdysenterypathogen
   
4. 
   giardiacysts.
   

12. Increased hardness of drinking water:

1. 
   has no adverse effect on a body
   
2. 
   violates the conduction of nerve impulses
   
3. 
   causes the development of stones in the kidneys and the bladder
   
4. 
   increasescardiovascularmorbidity.
   

13. What index of microbiological safety of water we use in assessment?

1. 
   oxidation
   
2. 
   ammonianitrogen
   
3. 
   theresidualchlorine
   
4. 
   totalbacterialcount.
   

14. Find water demand of adult human body under normal conditions (g per kg) below:

1. 
   35-45
   
2. 
   80-100
   
3. 
   100-120
   
4. 
   morethan 150.
   

15. MPC of fluoride in drinking water is normalized according to …:

1. 
   fluorinating or artificial defluorination water
   
2. 
   biogeochemicalendemicprovince
   
3. 
   climaticregion
   
4. 
   hardenssofwater.
   

16. What substance in drinking water can block the body's oxygen transport by hemoglobin?

1. 
   oxygen
   
2. 
   nitrates
   
3. 
   carbonates
   
4. 
   bicarbonate.
   

17. Water from surface water bodies is different from confined (artesian) water by …:

1. 
   greater mineralization
   
2. 
   a stablechemicalcomposition
   
3. 
   greatertransparency
   
4. 
   greaterbacterialcontamination.
   

18. Select correct requirement regulated by drinking water standards in the list below:

1. 
   water should have an aftertaste and smell more than 2 points
   
2. 
   water must have a certain chemical composition
   
3. 
   water must not contain pathogens
   
4. 
   watermustbewarm.
   

19. Water source with fresh (recent) contamination by organic substances will contain:

1. 
   carbonates
   
2. 
   bicarbonates
   
3. 
   ammoniumsalts
   
4. 
   nitrates.
   

20. Brief laboratory analysis of water involves the study of:

1. 
   radioactivity
   
2. 
   physicalproperties
   
3. 
   hydrologicalproperties
   
4. 
   radioactiveandorganolepticproperties.
   

21. Biochemical oxidation of organic nitrogen compounds to nitrates is carried out with participation of …:

1. 
   E.coli
   
2. 
   V. Nitrosomonas
   
3. 
   B. Nitrobaster
   
4. 
   Cl. Botulinum.
   

22. Find the tight chemical index of water contamination by organic substances among listed below:

1. 
   oxidation
   
2. 
   hardness
   
3. 
   pH
   
4. 
   thetotalmicrobialcount.
   

23. Zone of strict protection of a water source is a territory:

1. 
   where no construction of enterprises is allowed
   
2. 
   where any construction of enterprises is allowed
   
3. 
   of a settlement that is supplied by water
   
4. 
   within 1 km around the water source.
   

24. What water has highest risk of bacterial contamination?

1. 
   groundwater
   
2. 
   surfacewater
   
3. 
   artesianwater
   
4. 
   rainwater.
   

25. Sanitary Protection Zone of water sources is …:

1. 
   a territory, in which a special regime of economic and other activities is established in order to protect drinking water sources and drinking water in centralized systems and (or) non-centralized systems from contamination
   
2. 
   a dedicated area consisting of three zones, in which a special regime of economic activity is established in order to protect the source from contamination
   
3. 
   a dedicated area consisting of two zones, in which a special regime of economic activity is established in order to protect the source from contamination
   
4. 
   a specially allocated territory and (or) water area, consisting of three zones, in which a special regime of economic and other activities is established in order to protect drinking water sources and drinking water in centralized systems and (or) non-centralized systems from contamination.
   

26. Water, as an element of the environment, should be considered as:

1. 
   index, which determines the level of social life
   
2. 
   vital factor
   
3. 
   factor, which forms the main indicators of epidemiological well-being
   
4. 
   index, quality of which determines the degree of dependence of humanl activity.
   

.
27. Surface water sources are different from confined ground waters by:

1. 
   significant mineralization
   
2. 
   a higher risk of contamination
   
3. 
   greater protection from pollution
   
4. 
   economic feasibility.
   

28. In order to assess water quality in water supply system, they take water samples. In what Water sampling for research to industrial inspection of water quality in drinking water supply systems must be carried out in the following points:

1. 
   at the destination point, the tap of house distribution systems or other water supply systems
   
2. 
   in the water reservoirs
   
3. 
   prior to entering the drinking water distribution network
   
4. 
   potable water before entering into homes.
   

29. Confined ground water differs from surface water sources by:

1. 
   increased oxygen content
   
2. 
   greater bacterial contamination
   
3. 
   economic feasibility
   
4. 
   greater protection from pollution.
   

30. The lowest total mineralization level, below of which is not recommended for drinking:

1. 
   1000 mg/l
   

1. 
   500 mg/l
   
2. 
   250 mg/l
   
3. 
   100 mg/l.
   

31. For supply by water from wells and springs usually they use:

1. 
   flowing artesian (confined) water
   
2. 
   ground water
   
3. 
   not flowing artesian (confined) water
   

1. 
   g) surface water after suitable treatment.
   

32. Endemic diseases is a disease …:

1. 
   caused by water pollution of domestic sewage
   
2. 
   caused by an excess or deficiency of trace elements in water and food due to excess or deficiency in soil of this area
   
3. 
   related to radionuclide contamination of water bodies
   
4. 
   caused by infectious agents in water.
   

33. Find one correct indicator of pollution of water with organic substances among listed below:

1. 
   ironsalts
   
2. 
   ammoniumsalt
   
3. 
   carbonates
   
4. 
   fluoride
   

34. Organoleptic properties of water include:

1. 
   smell
   
2. 
   odor, taste, color
   
3. 
   smell, taste, color, turbidity
   
4. 
   smell, taste, color, turbidity, hardness
   

35. Find one correct indicator of pollution of water with organic substancesamong listed below:

1. 
   carbonates
   
2. 
   fluoride
   
3. 
   ironsalts
   
4. 
   chlorides
   

36. Find one correct indicator of pollution of water with organic substances among listed below:

1. 
   fluoride
   
2. 
   ironsalts
   
3. 
   saltsofnitrousacid
   
4. 
   carbonates
   

37. When you select a source of water supply of the population what water is preferred?

1. 
   rainwater
   
2. 
   soil
   
3. 
   artesian
   
4. 
   surface.
   

38. Find one correct indicator of pollution of water with organic substancesamong listed below:

1. 
   nitricacidsalt
   
2. 
   carbonates
   
3. 
   fluoride
   
4. 
   ironsalts
   

39. What does the presence of organic substances in water indicate?

1. 
   theycauseintoxication
   
2. 
   the possible presence of pathogenic microorganisms in the water
   
3. 
   they worsen the taste of water
   
4. 
   theychangepHofwater
   

40. The mineral composition of the water can be the main cause of:

1. 
   an aqueous fever
   
2. 
   seizure of the disease
   
3. 
   dental fluorosis
   
4. 
   endemic goiter.
   

41. Insufficient content of what trace element in drinking water can lead to the development of anemia, abnormalities in the physical development of children and disruption of puberty?

1. 
   zinc
   
2. 
   cadmium
   
3. 
   molybdenum
   
4. 
   copper
   

42. Insufficient content of what trace element in drinking water can lead to the development of anemia, abnormalities in the physical development of children and disruption of puberty?

1. 
   cadmium
   
2. 
   iodine
   
3. 
   strontium
   
4. 
   iron
   

43. The optimum supply of what trace element in the body with water contributes to a decrease in the incidence of caries?

1. 
   copper
   
2. 
   molybdenum
   
3. 
   iodine
   
4. 
   cadmium
   

44. Methods of drinking water treatment include:

1. 
   mixing water with high quality water
   
2. 
   dilution
   
3. 
   replacement of pipes in water treatment systems
   
4. 
   disinfection.